[slime-devel] Strange behavior in edit-definition

[Helmut Eller]

Antonio Menezes Leitao <aml at gia.ist.utl.pt> writes:

> and maybe it was that 'package' variable being referenced after
> changing to a different buffer that was causing the problem.  An hard
> to believe explanation, I'm sure, but just in case, I experimented
> replacing that 'package' variable by another gensym, using:

I can believe that.  The reason for problems like this are those 
-*- package: ... -*- file variables.  This make package a buffer local
variable in Emacs and interacts badly dynamic bindings.  E.g.:

(progn
  (make-variable-buffer-local 'my-var)
  (setq my-var 1)
  (message "%s" my-var)
  (let ((my-var 2))
    (message "%s" my-var)
    (with-temp-buffer 
      (message "%s" my-var))))

my-var in the temp buffer is nil.  One would think that a simple rule
like: first search let-bound variables, then buffer local variables
and then global variables would avoid such problems but this is
obviously not what Emacs does.

It's probably a good idea to avoid the -*- package: ... -*- thing as
the file has probably a in-package form already or a least rename it
to Package.

I committed you change.  Thanks.

Helmut.